Keystones — Lintel
Five GCSE retrieval questions · 22 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.031
Answer: 3.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 39°. Find adjacent side
Answer: 29.5cm -
4. Ratio Mixed ratio problems
In ratio 1:2:2, what fraction is the second part?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 32, 22, 44, 5, 18, 50
Answer: 28.5